Qt 6: Qt Image Formats - enable tiff compilation

Vookimedlo

Hi there,

I'd like to build the Qt Image Formats (6.0.0) including the TIFF support. How do I enable the TIFF compilation.

➜ pwd
/Users/duda/Qt/AdditionalLibraries/Qt/qtimageformats-6.0.0/Src
➜ conan install . --build=missing --profile=/Users/duda/Qt/Tools/Conan/profiles/qt-6.0.0-macx-clang -s build_type=Release -g cmake_paths -g=cmake -g deploy

Configuration:
[settings]
arch=x86_64
build_type=Release
compiler=apple-clang
compiler.libcxx=libc++
compiler.version=11.0
os=Macos
[options]
qt6=6.0.0
[build_requires]
[env]
QT_PATH=/Users/duda/Qt/6.0.0/clang_64
conanfile.py (qtimageformats/6.0.0): Installing package
Requirements
Packages

Installing (downloading, building) binaries...
conanfile.py (qtimageformats/6.0.0): Generator cmake_paths created conan_paths.cmake
conanfile.py (qtimageformats/6.0.0): Generator deploy created deploy_manifest.txt
conanfile.py (qtimageformats/6.0.0): Generator txt created conanbuildinfo.txt
conanfile.py (qtimageformats/6.0.0): Generator cmake created conanbuildinfo.cmake
conanfile.py (qtimageformats/6.0.0): Generated conaninfo.txt
conanfile.py (qtimageformats/6.0.0): Generated graphinfo

➜  ~/Qt/Tools/Conan/conan build .
Using lockfile: '/Users/duda/Qt/AdditionalLibraries/Qt/qtimageformats-6.0.0/Src/conan.lock'
Using cached profile from lockfile
conanfile.py (qtimageformats/6.0.0): Calling build()
CMAKE_PREFIX_PATH for 'qtimageformats/6.0.0' build is: /Users/duda/Qt/6.0.0/clang_64
CMAKE_PREFIX_PATH for 'qtimageformats/6.0.0' build is: /Users/duda/Qt/6.0.0/clang_64
-- The CXX compiler identification is AppleClang 12.0.0.12000032
-- The C compiler identification is AppleClang 12.0.0.12000032
...
-- Could NOT find JPEG (missing: JPEG_LIBRARY) (found version "80")
-- Could NOT find Jasper (missing: JASPER_LIBRARIES JASPER_INCLUDE_DIR JPEG_LIBRARIES)
-- Could NOT find TIFF (missing: TIFF_LIBRARY) (found version "4.0.9")
-- Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
-- Could NOT find WebP (missing: WebP_INCLUDE_DIR WebP_LIBRARY WebP_demux_INCLUDE_DIR WebP_demux_LIBRARY WebP_mux_INCLUDE_DIR WebP_mux_LIBRARY)
...
 * Qt6BuildInternals
 * Qt6CoreTools (required version >= 6.0.0)
 * Qt6Core
 * OpenGL
 * Qt6GuiTools (required version >= 6.0.0)
 * Qt6Gui
 * Qt6 (required version >= 6.0.0)

-- The following OPTIONAL packages have not been found:

 * JPEG
 * Jasper
 * WrapJasper
 * TIFF
 * PkgConfig
 * WrapWebP

Configure summary:

Further Image Formats:
  JasPer ................................. no
  MNG .................................... no
  TIFF ................................... no
    Using system libtiff ................. no
  WEBP ................................... no
    Using system libwebp ................. no

I am using the BigSur (Intel) for compilation and can't find out how can I enable the TIFF compilation. I see that the libtiff sources are bundled in the qtimageformats. I also have the system libtiff installed.

➜ pkg-config --static --libs libtiff-4
-L/usr/local/Cellar/libtiff/4.1.0_1/lib -ltiff -ljpeg -lz
➜ pkg-config --static --cflags-only-I libtiff-4
-I/usr/local/Cellar/libtiff/4.1.0_1/include

Could you point me on the right way in my investigation?

Thanks a lot!

SGaist

Hi and welcome to devnet,

Did you check the test logs to see exactly what failed ?

Vookimedlo

Could you point me to the file I am supposed to check?

I would say that I need to somehow instruct conan to set the QT_FEATURE_tiff:INTERNAL and the FEATURE_tiff:BOOL to on.

➜  Src grep tiff * -R | more
CMakeCache.txt://  Using system libtiff
CMakeCache.txt:FEATURE_system_tiff:BOOL=OFF
CMakeCache.txt:FEATURE_tiff:BOOL=OFF
CMakeCache.txt:INPUT_tiff:STRING=undefined
CMakeCache.txt://STRINGS property for variable: INPUT_tiff
CMakeCache.txt:INPUT_tiff-STRINGS:INTERNAL=undefined;no;qt;system
CMakeCache.txt:QT_FEATURE_LABEL_system_tiff:INTERNAL=  Using system libtiff
CMakeCache.txt:QT_FEATURE_LABEL_tiff:INTERNAL=TIFF
CMakeCache.txt://Qt feature: system_tiff
CMakeCache.txt:QT_FEATURE_system_tiff:INTERNAL=OFF
CMakeCache.txt://Qt feature: tiff
CMakeCache.txt:QT_FEATURE_tiff:INTERNAL=OFF

SGaist

See this blog entry on how to manipulate the feature system with cmake.

Vookimedlo

@SGaist Thank you very much, that helped!

I had to update the conanfile.py because I do not know how to pass the required arguments to cmake via conan CLI.

And it really works - the bundled libtiff is now being built including the Qt TIFF plugin!!!

SGaist

Are you using the just released 6.0.0 sources ?

Vookimedlo

@SGaist Yes, all installed via the Qt installer.

Vookimedlo

@SGaist Just tried to build the same module on the Windows machine and I would say that Qt might have a bug inside.

There is no Release configuration, I had to specify the RelWithDebInfo.

conan install .. --build=missing --profile=C:\Qt\Tools\Conan\profiles\qt-6.0.0-msvc2019_64 -s build_type=RelWithDebInfo -g cmake_paths -g=cmake -g deploy -o qtimageformats:shared=True